Bascule bridge



June 28; 41927. 1,633,565 l L. R. ASH ET AL BASCULE BRIDGE Filed Sept.7', 1926' ll5QShese'cs--Sheet l- A, ,"lul ML! I f' /7 'ATTORNEY' K June28, A1927.

l.. R. ASH ET AL BASCULE BRIDGE Filed Sept. 7, 19.26

L. R. ASH. ET AL BASCULE BRIDGE June 28, 1927. 1,633,565

Patented June 28, 1927. l j

.UNITED STATES 1,633,565 vPATENT oFFlcE.

LOUIS R. ASH, HENRY C. TAMMENVAND'HARRY HUNTER, Olli'V KANSAS CITY,

l BASCULE 'Application led VSeptember for the movable span when ,thebridge is closed; all without interference .with fthe trusses of themovable span.

In accomplishing these and other objects -of the invention, we haveprovidedimproved details of structure, 'the'prefeiredforms of .which areillustrated in the accompanying drawings wherein:

Fig. 1 is'an elevation of a double span bascule bridgeequipped with our'improved supports;l

Fig. 2 isaplan lview ofabutting ends'of fixed and movable spans;

Fig. i3 is an enlarged vside elevationrof movable and fixed-'spana'inconnectionwith the support, the bridge being shown in closed position;

Fig. 4 is a similar viewiof thesameparts asthey appear-when the bridgeis open;

Fig. 5 is a transverse, -vertical section on the line 5 5, Fig. 2;

Fig. 6 is a transverse, `vertical sectionon Fig. 7 is adetailperspective view ofone of the trunnion posts.

Referring more in detail to the drawings:

'1, 2 designate fixed 'abutments at the op- V`positersides of a channelfor supporting the movable spans of a bascule bridgeof 'any ordinarytype, except -for the improvements hereinafter noted. v lVhile we have,in the principal figure o the drawing, indicatedvour improvements asapplied to a double.spanbridge,they are not necessarilyvlimited to thistype, but apJ plicableas well to a'single span'bridge, the supportsbeing merely duplicated on each' of the abutments when used inconnection with f abridge of the double span type. yFor that reason wewill refer to but one of the supports'with the vunderstanding thatVsuch, de scription relates equally to both. n

Mounted on the abutment 1 are spaced trunnion posts, indicated generallyby the numeral-3each ofthe posts vcomprising f spaced, paired columns 4yand 5, mounted lin l M rssonm., f

BRIDGE.l

7, v192e. yserial No. 133,816.`

separate seats 6, 7 on a common baseAS, resting on and suitably securedtothe abutment, the yseatsbeing preferably cross-braced as at .9. Theinnerfand outer columns 4and-5fare cross-braced; at the topandfbottomiby ,angles ,10, .11- and plates 12 and 13, leavingxan opening14 between the 4angles for a purpose presently s described.

Connected with the top of the outer column 5, by a gusset plate 15, is aforwardlydirected, diagonal brace 16,- resting -at its lower end in aseat lon the abutment land havingcrossfand diagonal braces-18 land 19vrunning` from about its center to `connect with `the column 5, the endsof the crossbrace being seated between gusset l plates v20 on a diagonaland-21 on thecolumn'andlthe diagonall brace 19 preferably seatingbetween theplates 2O onthe diagonal and in the seat 7 within which thelower end ofthe column is also located. Restingin a seat 22 onv theabutment land risingto aboutthe level of the-pivotbearingson inner andouter column, presently.` described, is la vertical brace `2.3.havingdiagonal sub-braces24 ,leading from about its center to Contact withthe-in- -ner column 4, and horizontal subfbraees 25 and h26 leading tothe column 4fthe endsof the sub-braces being seated between gussetplates 27, 28, 29, and v30 on the vertical brace and von the column 4respectively.Y t

Onthe topsof the inner and outer columns 4 and 5 are pivot bearings 31,of -anysuitable type adapted for mounting the pivot members on the sidetrusses of a `movable bridge span. Y v Y Fixedto and extendingrearwardly `from the inner column 4 are bracket membe1's32,

33, supporting an upright '34, and fixed tothe uprights 3.4 onthebracketsof-therespective trunnion posts is a girder 35 that, extendsbeneath the end of therfixed floor overfther counte1weight. The innercolumns ofthe trunnion post --at opposite sides of the bridge areconnected v and `braced'bygirts 36 and diagonals 37 -of vany suitableconstruction, in order to provided withpivot members 43,-whichseat l inthe bearings 31 on the tops of the trunnion post columns, theside-trusses being in longitudinal alignment with the spaces between thecolumns of the respective trunnion posts and having members 44 extendingfrom a point forwardly of the trunnion posts, through the openings 14 insaid posts to the counter-weight 41, the spacing between the cross-bras10 and 11 of the trunnion posts being sufiicient to allow the trussmembers 44 to play in said space during opening and closing movements ofthe span, without interference. Y

Between the side trusses 42 is a stop 45 arranged to contact the topsofthe vertical braces 23 of the respective trunnion posts to support theleaf when the latter is in trafc carrying position.

, With the movable span constructed as described, mounted on a supportemploying our improvements, the end Vof the fixed floor over the counterweight is supported at all times from the brackets on the trunnion postsand the movable span has supplemental support on the upper ends of thevertical braces of the support when the bridge is closed. During openingor closing travel of the movable span, the rearwardly directed trussmembers travel through the trunnion posts without interference, and thecounterweight moves in an arc beneath and rearwardly of thesupplementalv fixed floor support, without interference therefrom.

It is apparent, therefore, that each of the movable span trusses may besupported in a balanced position on the spaced tr-unnion posts, and thatthe diagonal, cross and vertical braces employed in connection with thepost columns absorb the various stresses to which the trunnion posts aresubjected in the operation of a bridge ofi' this type.

Having thus described our invention, what we claim is new therein, anddesire to secure by Letters Fatent is:

l. In a bascule bridge, spaced trunnion post-s, bearings on said-posts,a live load supporting member on and forward of the posts. an approachsupport extending in the opposite direction and supported by said posts,a movable span comprising side trusses and pivot members having mountingin said bearings, and a transverse girder connecting the 'trusses andadapted to sea-t on said supporting member when the span' is in loadcarrying position.

2. In a bascule bridge, spaced trunnion posts, each comprising` spacedinner and outer columns, bearings on the columns, a diagonal brace forthe outer column of each post, a vertical brace for the inner column oteach post, terminating at substantially the level of the said bearings,a span movable between the outer columns of the trunnion posts andcomprising side trusses. and

agirder connecting said trusses and seated on said vertical braces whenthe span is in load carrying position.

8. In a bascule bridge, spaced trunnion posts, each comprising spacedinner and outer columns, spaced transverse braces connecting the columnsoff each post, a diagonal brace Yfor each outer column, a vertical bracefor each inner column, a span comprising side trusses having membersmovable between the columns ot' respective trunnion posts and betweensaid transverse braces, and a transverse girder connecting said truss-esand seated on said vertical braces when the span is in load carryingposit-ion.'`

' 4.v In combination with the fixed and movable spans ot a basculebridge, spaced trunnion posts, trusses on the movable span having pivotbearing on the trunnion posts, brackets on the trunnion posts betweenthe trusses, and a girder on the-brackets supporting the end ot thefixed floor.

5. In connection with the fixed and movable spans-of a bascule bridge,spaced trunnion posts, Ieach comprising paired columns,

cross braced and provided with bearings,v

Vgirder on said brackets supporting the end of the fixed floor over thecounter-weight,

'spaced cross braces for the columns, bearings on the columns, a movablespan comprising side trusses having pivot members seated in saidbearings and having members extending through the trunnion posts betweenthe column braces, and a counterweight on the rear ends of said trusseslo-A cated beneath the fixed floorl and rearward of said supportinggirders when the bridge is closed. 1

7. In a bascule bridge, a pair of trunnion posts, each comprising a pairof spaced columns, having post bearings and spaced croGs braces,diagonal braces for the outer columns, vertical braces for the innercolumns terminating substantially at the level of the post bearings.fixed and movable spans having a floor break rearwardly ot the postmountings, rearwardly directed brackets on the inner columns, having across girder supporting the end of the fixed floor and side trusses onthe movable span Vhaving members movable between the paired columns ofthe trunnion posts, other members s-eatable on said vertical braces, anda counter-Weight located beneath the fixed on the brackets supportingthe end of the `loor back of the supporting girders when fixed floor.the bridge is closed. In testimony whereof We atlix our signa- 8. Incombination with the fixed and tures.

5 movable spans of a bascule bridge spaced v e trunnon posts, trussesonthe movable span LOUIS R. ASH. having pvot bearing on the trunnionposts, HENRY C. TAMMEN. brackets on the trunnon posts, and a grder HARRYG. HUNTER.

